Australian police said nothing suspicious had been found after reports of a device forced the evacuation of a Pacific Blue airliner which landed in Sydney from Fiji today.
"Following an extensive search, nil items were found and the all-clear was given," New South Wales state police said in a statement.
Approximately 100 passengers and crew were evacuated from the Boeing 737 airliner that landed at 5.45pm (6.45am Irish time) in Sydney from Nadi, Fiji's main international hub.
The plane had been parked away from the main terminal buildings while the threat was being investigated. The east-west runway at Sydney airport had been closed.
The threat against the flight had been called in from the Philippines while the aircraft was in the air.
Australia, a staunch US ally with troops in Iraq and Afghanistan, has never suffered a major peacetime attack on home soil.
Australian tourists have been targeted in recent attacks in Indonesia, however, including the 2002 Bali nightclub bombings in which 202 people died, including 88 Australians.